KR20030023507A - Worktable for an apparatus for grinding recesses - Google Patents

Abstract

PURPOSE: A worktable for an apparatus for grinding recesses is provided to lengthen the life span of a grinding belt through uniform wear of the grinding belt and perform notching by reducing worker's labor and operating a sole control unit. CONSTITUTION: A worktable(6) for an apparatus for grinding recesses has on a frame(3) a pair of pulleys supporting a grinding belt(2) moving endless along a lengthwise axis of the frame. The worktable supports a workpiece vice(20) pivoted around an orthogonal pivoting axis on a first slide(16) and set in the angular position with respect to a shaping pulley(1) of the pair of pulleys. The worktable is provided with a sole control member(19) to approach and move apart the workpiece vice with respect to the shaping pulley. The sole control member is of a manual type and the sole control member is of a powered type.

Description

WORKTABLE FOR AN APPARATUS FOR GRINDING RECESSES}

The present invention relates to a work table for a groove grinding device.

The groove grinding device described below is a hand operated machine, also called a notching machine, and is suitable for forming grooves by grinding at both ends of a tubular workpiece. The apparatus has a pair of pulleys carrying the grinding belts, one of which is a drive pulley for the grinding belt and the other pulley is a forming pulley which cooperates with the grinding belt to form a groove. The vise that holds the pulley to be worked on is placed in the vicinity of the forming pulley and moves towards and away from the forming pulley so that the pipe held by the vise can be ground.

In order to achieve such a movement, in the conventional groove grinding device, the vise for fixing the pipe is a desired shape in which the axis of the forming pulley and the axis of the pipe to be worked on are defined by the same axis in the horizontal plane. It is rotatably mounted on a workbench in a position to form an angle. Usually, the angle described above may vary between 90 and 30 degrees. A work platform, typically consisting of a pair of carriages sliding on axes perpendicular to each other, is obtained through two vertical movements with respect to the shaping pulley, one of which is parallel to the shaping axis of the shaping pulley. Accordingly having a conveying motion which is generally controlled by a manual conveying means.

These conveying means usually comprise a variety of guides made of a pair of parallel cylindrical portions which engage with corresponding through holes formed inside slides of the workbench, and the parts moving vertically with each other are handwheel or lever operated links. Are actuated by wheels, worm screws or rack pinion gears or other components, which are controlled through the gears.

In any case, the motion along one direction of one slide on the work surface is independent of the motion of the other slide in another direction perpendicular to the first direction. Therefore, the worker usually forms a groove in the tubular workbench by simply approaching the tubular workpiece to the grinding belt in the center position in the width direction of the grinding belt. Of course, the grinding belt wears out unevenly, and as a result its life is reduced.

Thus, an operator who is careful to extend the life of the grinding belt has to work delicately so that the grinding of the groove is carried out over the entire width of the belt, while the belt runs endless on the two pulleys of the device. shall. This requires hard work of the operator.

The present invention is to overcome the above-mentioned problem.

In particular, it is an object of the present invention that each workpiece is automatically processed over the entire width of the grinding belt, so that the wear of the entire surface of the grinding belt is uniform, so that the life of the grinding belt can be extended.

Another object of the present invention is to reduce the labor of the operator for the grinding device, so that the operator can perform notching by operating only one adjustment means.

1 is a perspective view of a first embodiment of a workbench according to the present invention applied to a groove grinding device in which only a part is shown in the drawings;

2 is a plan view of a first embodiment of the work bench shown in FIG. 1,

3 is a front view of a first embodiment of the work bench shown in FIG. 1,

Figure 4 is a perspective view of a second embodiment of the workbench according to the invention applied to the groove grinding device shown only partly in the figure,

5 is a plan view of a second embodiment of a workbench,

FIG. 6 is a front view showing a reduced size of a second embodiment of the work bench shown in FIG. 5;

FIG. 7 is a right side view of a second embodiment of the work bench shown in FIG. 5 in a reduced form;

8 is a perspective view of a modified second embodiment of the work bench,

9 is a plan view of the work bench shown in FIG. 8,

10 is a partial bottom view of the slide in the longitudinal direction of the workbench of FIG. 8;

The object is to have a pair of pulleys on the frame that bear a grinding belt that moves endlessly along the longitudinal axis of the frame, pivoting about a vertical pivot on its first slide and forming a pair of pulleys of the pulley. A workbench for a groove grinding apparatus that supports a workpiece vise that can be fixed in its angular position with respect to the forming pulley, wherein the workpiece pulley is provided with access to the workpiece vise and moved away from the workpiece vise. It is achieved by the present invention through a workbench characterized by having two adjusting members.

As a result of only one motion adjustment, the groove is ground inside the tubular workpiece using the entire width of the grinding belt. The distribution of heat generated when the workpiece is processed extends to all surfaces of the grinding belt, and this feature increases its life with the uniform use of the grinding belt.

Preferably, thanks to the combined movement of the transverse transverse with respect to the grinding belt, which is the same as the longitudinal conveyance towards the grinding belt, such an operation performed at the end of the tubular workpiece is carried out with a piece of metal produced during The burr is greatly reduced and because of the better distribution of heat on the grinding belt than before, a high finish quality can be obtained in the workpiece.

Hereinafter, the present invention will be described in more detail with reference to two embodiments of the present invention with reference to the accompanying drawings in which:

First, referring to FIGS. 1 to 3, in the present invention, in the present invention, the shaping pulley 1 having only the axis x and the grinding belt 2 travels thereon, and the support 4 (FIG. 3). Only a portion of the frame supported by is shown. The work bench according to the first embodiment of the present invention, collectively indicated by the reference number 6, is supported by the depression 5 of the frame 3.

The platform 8, which is bent in a U-shape at the opposing vertical walls 9, 10, pivots about the depression 5 of the frame 3 using the pin 7. The platform 8, which rotates around the pin 7, is perpendicular to the longitudinal direction of movement of the grinding belt 2, indicated by the arrow N in FIG. 2, ie with respect to the axis x of the forming pulley 1. Can be arranged in its angular position through its axis y perpendicular to 9, 10). The platform 8 is inserted by inserting the fixing pin 11 through the through holes formed in the rotating platform 8 and generally indicated by reference numeral 12 and through holes 13 formed in the frame 3. Can be arranged. The purpose of arranging the platform 8 will be described later.

Two cylindrical guides 15 to the slide 16 are connected to the vertical walls 9, 10 of the platform 8 by screws 14. As conventional, the slide 16 has corresponding through holes 17 that engage the cylindrical guides 15. In addition, the shaft 18 on which the handwheel 19 is installed is also arranged on the vertical walls 9, 10 of the platform 8. This handwheel 19 corresponds to a manual adjustment member for controlling the movement of the slide 16 on the cylindrical guide 15. The connection between the shaft 18 and the slide 16 is conventional and will not be described here.

The workpiece vise 20 is mounted while rotating on the slice 16. Usually, the workpiece | work vise 20 is fixed to the slot 22 which has the shape of an arc, and the slide 16, and it arrange | positions the angular position of the workpiece | work vise 20 with respect to the moving direction N of the grinding belt 2, and is. It has a base 21 with a fixing screw 23 configured to set.

From the foregoing, it can be seen that, unlike the prior art, manual adjustment is performed via only one adjusting member, ie the handwheel 19. The angle α is the angle between the axis y that follows when the slide 16 slides at right angles to the walls 9, 10 and the axis x of the shaping pulley 1 (FIG. 2). According to the invention, this angle α takes into account the fact that the grinding operation must be carried out over the width L premise of the same grinding belt 2, in order to obtain uniform wear of the operational belt 2, in the form of a tubular workpiece It is chosen based on the depth of the groove that must be made at one end of the. Of course, the depth of the groove depends on the one hand on the diameter D of the tubular workpiece (not shown) and the inclination of the workpiece relative to the grinding belt.

At this time, with respect to the groove over the entire diameter D of the tubular workpiece, that is, the groove having an axis perpendicular to the axis of the tubular workpiece, in the right triangle having the width L of the calculation belt 2 as one vertical side (cathetus) It can be readily seen that the size of the angle α should be chosen so that another vertical side opposite the angle α has a size of D / 2. This angle α should be set using a fixing pin 11 inserted concentrically into the hole 12 of the platform 8 and the appropriate hole 13 of the frame 3.

In the above example of the groove having an axis perpendicular to the axis of the tubular workpiece, the workpiece vise 20 is such that the axis of the tubular workpiece is aligned with the direction of arrow n of the movement of the grinding belt 2. That is, it must be maintained with a slope perpendicular to the axis x of the shaping pulley 1. On the other hand, when forming a groove having an axis inclined by the set angle with respect to the axis of the tubular workpiece, the workpiece vise 20 should be inclined by the same set angle using the slot 22 and the fixing screw 23. do.

Hereinafter, referring to FIG. 4 using the same or similar reference numerals to indicate the same or similar parts as those described with reference to FIGS. 1 to 3, the groove grinding apparatus has an axis x and the grinding pulley 2 is driven thereon. Only the molding pulley 1 and part of its frame is shown. The working table 60 according to the second embodiment of the present invention is supported by the depression 5 of the frame 3.

The workbench 60 is shown to be separate from the apparatus shown in FIGS. 5-7, which are plan and vertical side views of the workbench, respectively.

The workbench 60 has a platform 80 secured to the depression 5 of the frame 3 using a screw 81 (FIG. 4). The fixed platform 80 has opposing vertical walls 90, 100. Two cylindrical sliding guides 150 for the transverse slide 160 advancing parallel to the axis x of the forming pulley 1 are connected to the opposite vertical walls 90, 100 by means of a screw 140. Underneath the fixed platform 80 is an operating device having a known lever shape collectively indicated by reference numeral 190 which constitutes a manual adjustment member for the movement of the transverse slide 160 on the cylindrical guides 150. .

The movable platform 181 is connected to the transverse slide 160. Above the movable platform 181 is a cylindrical sliding guide for the longitudinal slide 160 having a stroke that moves away from the stroke approaching the forming pulley 1 along the longitudinal direction N of the movement of the grinding belt 2. Fields 151 are present. As in the first embodiment, the workpiece vice 20 has a slot 22 and a length having an arc shape, which sets the angular position of the workpiece vice 20 with respect to the movement direction N of the grinding belt 2. It has a base 21 with a fixing screw 23 for the slide 161 in the direction.

Moreover, the longitudinal slide 161 can rotate within its angle and form a linear linear cam 30 in the same plane as the parallel sliding planes of the transverse and longitudinal slides 160, 161. Is bound.

The rotating linear linear cam 30 consists of a channel 31 that orthogonally turns on a fixed platform 80 of the work bench 60 using a rotating pin 32 (FIG. 4). As shown in FIG. 5, the channel 31 is received in an arc-shaped slot 34 of the fixed platform 80 and is decentered from the fixed pin 33 fixed to a desired position by the locking lever 39. Has

As shown in FIG. 4, the cam follower of the linear cam 30 is a slide roller 35 inside the channel 31. The slide roller 35 is connected to the longitudinal slide 161 using a screw 36 and an arm 37. In order for the roller 35 to be secured so that the linear cam 30 can be secured without any interference throughout the slot 34, the arm 37 preferably reduces the weight by the through slot 38.

The operation of the work bench of the second embodiment is similar to that of the first embodiment described with reference to FIGS.

In this second embodiment, the angle α is the angle between the sliding axis y of the linear cam 30 and the axis x of the shaping pulley 1. This angle α is selected similarly to the first embodiment.

In grinding grooves inside the tubular workpiece, once the linear cam 30 is adjusted according to the desired angle with respect to the diameter to be processed, only one lever adjusting member 190 is operated to move the transverse slide 160. It is sufficient to displace over the entire width of the grinding belt 2. At the same time, the slide 160 in the longitudinal direction is moved forward toward the forming pulley 1 by the linear cam 30 to perform the desired grinding.

8 to 10, there is shown a second modified embodiment of the work bench according to the invention. Such a modification is specially developed for processing large diameter workpieces in which the conveying length becomes very large because the conveying length in the longitudinal direction of the workpiece can reach the size of the radius of the same workpiece.

In Figs. 8 to 10, the same or similar reference numerals denote the same or similar parts as those of Figs.

Due to the long longitudinal conveyance of the workbench, this linear arm 300 must be fixed on the platform 800 so that the inclination angle β between the rotating straight linear arm 300 and the longitudinal conveying direction can be adjusted. . For this purpose, a second arc shaped slot, indicated at 134, is used. This slot 134 operates similarly to the slot 34 of the fixed platform 80 and will not be described any further.

In this second modified embodiment, the lever operating device for manually adjusting the forward movement of the transverse slide 80 on the cylindrical guide 150 lying underneath the platform 80, Due to the large reaction force generated by the sliding motion acting on the cam which is almost perpendicular to the operation, it is simply not available or cannot be used.

For this reason, performing the adjustment for conveying the workpiece vise directly on its slide with a longitudinal cross section, ie, with the slide roller 35 inside the channel 31 of the linear cam 30, is the same. It is suitable to operate almost directly in the direction. The slide roller 35 is connected to the longitudinal slide 161 using a screw 36 and an arm 370. The arm 370 preferably has an open slot 380 so that the roller 35 can be easily fixed.

In this modified second embodiment, the longitudinal slide 161 has an auxiliary lever (as shown in FIG. 10 corresponding to the bottom view taken from the movable platform 181 of the longitudinal slide 61). 191). The auxiliary lever 191 pivotably pivots near the front edge 182 of the movable platform 181 on the opposite side of the operating surface of the longitudinal slide 161. The longitudinal slide 161 is suitably mounted on the floor with a pin 183 designed to engage an open slot 184 formed in the middle of the auxiliary lever 191.

In operation, once the lever 190 is disengaged, when the auxiliary lever 191 is operated through its handle 195 along both arrows F until it moves to its position 191 '(indicated by the dashed line), The longitudinal slide 161 is likewise displaced laterally on the transverse slide 160 by engagement with the linear cam 300 and moves forward to 161 ', and the vise 20 moves to 20'.

The invention can be modified without departing from the scope of the invention. For example, in the above embodiments, the manipulation adjusting means has been described as a handwheel or a lever. Of course, these manual operations can be servo-controlled or powered in a conventional manner, for example via an aerodynamic circuit.

According to the present invention, each workpiece is automatically processed over the entire width of the grinding belt, so that the wear of the entire surface of the grinding belt is uniform, thereby extending the life of the grinding belt and of course, By reducing the labor, the operator can perform notching by operating only one control means.

Claims (6)

It has a pair of pulleys on the frame 3 which support the grinding belt 2 moving endlessly along the longitudinal axis of the frame 3, and on its first slide 16; 161 around its vertical pivot axis. In the worktable for groove grinding apparatus 6 and 60, which supports a workpiece vice 20 which can be fixed at its angular position relative to the forming pulley 1 of the pair of pulleys, A work piece characterized by having only one adjusting member (19; 190; 191) for accessing said workpiece vise (20) with respect to said forming pulley (1) and moving away from said workpiece vise. The method of claim 1, The work piece characterized in that the one adjustment member (19; 190; 191) has a manual form. The method of claim 1, The one adjustment member is a worktable, characterized in that it has a form of moving by power. The method of claim 1, The first slide 16 is slidably mounted on a rotating platform 8 pivoting on the frame 3 about an axis parallel to the pivot axis of the workpiece vise 20, and the rotating platform 8. ) Is position adjustable relative to the frame 3, The one adjustment member is a worktable, characterized in that consisting of a handwheel (19) for sliding operation of the first slide (16). The method of claim 1, The first slide 161 which slides along a sliding direction parallel to the longitudinal axis of the frame 3 is 161 perpendicular to the longitudinal axis of the frame 3 by means of a first movable platform 181. Fixed on a second slide 160 which slides on a second fixed platform 80; 800 along one sliding direction, the sliding direction being on a plane parallel to each other, wherein the first slide 161 is Further connected to a linear cam 30; 300 in a straight line that rotates within its angle coplanar with the parallel planes on the fixed platform 80; 800, The one adjustment member is a working table, characterized in that consisting of a lever (190; 191) for the sliding operation of the second slide. The method of claim 5, The rotating straight linear arms 30 and 300 have channels 31 orthogonally pivoting on the fixed platform 80 and arc-shaped slots 34 and 134 of the fixed platform 80 and 180. A fixed pin 33, which is stored in the slot and fixed inside the slot at a desired position, is offset from the center, and the cam difference of the linear arms 30 and 300 is a slide roller 35 inside the channel 31. And the slide roller (35) is connected to the first movable slide (161) by an arm (37; 370).